PR Summary

Addition to#24879.

ConvertedInvalidCommandNameCharacters toSearchValues<char> to do optimized char searching.

PR Context

PR Checklist

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• Summarized changes
• Make sure all.h,.cpp,.cs,.ps1 and.psm1 files have the correct copyright header
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• User-facing changes
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  • Documentation needed
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    • Impact onEditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).
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